Insulator-support.



C. L. PEIRCE, JR.

INSULATOR SUPPORT.

- APPLICATION FILED FEB. 5, 1916.

1 1 9 7, 65 9 Patented Sept. 12. 1916.

INVENTOR.

A TTORNEYS.

STATES PATENT OFFICE.

CHARLES L. PEIRCE, JR, or T TTsBURGH, PENNSYLVANIA, AssIGNon OF ONE-HALF T0 HUBBARD & 00., or PITTSBURGH, PENNSYLVANIA, A CORPORATION or PENN- sYLvAnIA.

INSULATOR-SUPPORT.

, Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed February 5, 1916. Serial No. 76,301.

To all dih'oi'n it ma /comma Be it known that LCliAntn's L. PEI'RoE, Jii, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvemerits in Insulator-Supports, of which the following is a specification.

My invention relates to insulator supports which are stronger and more practical and efficient than insulator supports heretofore used:

My inveiitidn relates particularly to insulat'or supports comprising a bracket memher and thi'mble structure secured thereto.

Heretofore bracket members have been formed up from in'etalsto'ck shapes such as channel bar, and thimble structures applied to the ends thereof. The parts of the thimble structures which receive the insulators must be of circular cross-section but when such structures are applied to bracket members of stock material the base parts of the thimbl'es must be bent to fit the contour and angles'of the bar and this of course weakens the support the very section where it should be strongest. here the thimble structures are sectional in order to" yield radially whenaii insulator is applied the sections are apt to'bend ,permanenu if the cylindrical form orcirjcul'ar cross-section below the thimble structure threads has been destroyed by bending the insulator structure to fit the bracket member end. In other words, circular cross-section thrbughout the thiinble structure will give the greatest strength and if such circular cross-section is in any wise destroyed the thimble structure and the entire support will be correspondingly weakened. I

The bracket member itself, when bent up from stock material has its disadvantages. In the first place, the stock must be taken as it is and the desired strength at one seeti'on ca nnot beobtained' without too much stock at some other "section, and consequently over-weight and waste. In the second place, when the support is formed up of stock material, for example channel bar, and the thimble structure is be'nt'to fit, there will be sharp edges and cornerson which wires c'ould'chafe or get caught;

The object of my invention is to overcome the disadvantages of the above referred to structures and to produce an insulator support comprising a bracket member built up ent rely from flat sheet'metal accurately d mensioned and bent to such form as to gi v'e the desired strength at each section wlthout over-weight and to provide a cylinidri'cal or co'nicalseat for a thimble structure also formed up'from flat sheet metal and of circular section throughout construction will insure the greatest strength whereit is most needed, namely, at the base of the thimble structure threads and adjacent the end of the bracket member to which the thimble structure is secured, and such circular cross-section throughout the insulator structure will also prevent permanent bending of the insulator structure sections a accompanying drawing I show an nsulator support 'Which'embodies' the various features of my invention.

on this drawing Figurel is a side elevational view of the support, Fig. 2 is a front elevational view, Fig. 3 is a sectional view on plane 3 3, Fig, 2, Fig.4 is a sectional V ew onplahe 44, Fig. 1, and Fig. 5 is a. perspective View showing one manner of applying the insulator support to a supporting ase.

The insulator support shown comprises a bra'cl'tet member B and a thimble structure T. The bracket member shown is of U- shape and is bent up entire from a single piece oi. fiat isl'i'eetmetal stock to be of, arched cross-section. The bracket member throughout itsbody part 10 is open, that is, the limbs 11 and 12 are separated at their ends and may be parallel as shown or at angles with each other. At the outer end of the body part the limbs 11 and 12 are brought together to form a seat e of circular crosssection for receiving the thimble structure T. 5 The thimble structure shown is of circular cross-section throughout and is sectional', two semi-cylindrical sections 13 and 1 1 being shown. These sections intimately fit at their bases against the cylindrical sides of the "end e and as shown are secured by a rivet 15 extending therethrough and throughthe end 6. The section may be applied in any desired arrangement to the bracket member end. As shown, the section 13 covers the jointure j of the bend in limbs 11 and 12 at the end a and the rivet passes through this jointure. The upper parts of the sections 13 and '14 are somewhat conical and are threaded to receive an insulator. In order that the sections may yield radially during application of the insulator they are normally separated at their edges by gaps 1(5 and 17, The thimble structure sections are formed integral from flat sheet metal stock and the threads are stamped in such manner that they will register when the finished sections are applied to the bracket member.

lVith the above arrangement involving the circular seat for the thimble structure which is of circular cross-section throughout, the support retains maximum strength where such strength is the most necessary, namely, just below the threads. Furthermore, the circular cross-sectional structure throughout will retain the full elasticity of the thimble sections and will prevent permancnt bending or give thereof when an insulator is applied and the sections are brought together, and after application of the insu lator the sections will, by their spring and elasticity, securely clamp the insulator in place. Instead of constructing the thimble structure of only two sections as shown, it is evident that they could be sub-divided into a greater number of sections which would be separated at their edges to yield radially to receive the insulator and to then clamp the insulator to the support.

Any suitable arrangement may be provided for securing the support to a wall, pole or other supporting structure. As shown in Figs. 1 and 2, ears 18 and 19 are formed integral at the inner end of the bracket member and have bolt holes 20 and 21 respectively. Instead of being secured individually to supports, a number of brackets could be mounted on a common support. In Fig. such arrangement is shown. The open arched backs of the bracket members 13 saddle over an arched frame 22 and straps 23 arch over each bracket and are secured thereto and to the frame by riveting 24, the strap having the wings or flanges 25 and 26 provided with bolt holes 27 by means of which the frame 22 with the various brackets thereon may be secured to a wall or pole.

In the insulator support described there is no waste of metal or over-weight. The blanks for the bracket member and thimble structure are accurately dimensioned before forming in accordance with the desired strength and are then bent into such form as will result in the greatest strength. The arch section bracket member is open outwardly leaving the rounded arch surface on the inner side so that it will be impossible for wires to chafe or catch. Likewise, the thimble receiving end being circular and free of corners, there will be no chance for wires to ehafe or get caught at such end or on the thimble structure.

I do not of course desire to be limited to the precise construction and arrangement shown as modifications may be possible which would still come Within the scope of the invention.

I claim as follows:

1. An insulator support consistin of a bracket member formed up entire from a single piece of flat sheet metal and having an end of circular cross-section, and a thimble structure of circular cross -section throughout and comprising threaded sections each formed up entire from a single piece of sheet metal, said sections being secured to the circular end of the bracket member.

2. An insulator support consisting of a bracket member and a thimble structure, said bracket member being formed up from a single piece of fiat sheet metal and having an end of circular cross-section, said thimble structure being of circular cross-section throughout and composed of sections secured at their bases to the circular end of the bracket member, said sections being threaded to receive an insulator and being separated a distance at their longitudinal edges to yield radially when an insulator is applied.

3. An insulator support consisting of a bracket member and a thimble structure, said bracket member being formed up entire from a single piece of flat sheet metal stock and comprising an open body of arch crosssection and a closed end of circular crosssection, said thimble structure being of circular cross-section throughout and composed of a number of sections of arcuate crosssection intimately engaging and secured at their bases to the closed end of said bracket member, said sections being threaded to receive an insulator and being separated sufiiciently to yield radially when an insulator is applied.

4:. An insulator comprising a bracket member and a thimble structure, said bracket member being bent up from a flat piece of sheet metal and having an end of circular cross-section, said thimble structure being of circular crosssection throughout and being composed of a number of sections engaging at their bases with the circular end of the bracket member and riveted thereto, said sections being threaded for the reception of insulators.

An insulator supporting structure comprising av body part bent up from a flat piece of comparatively heavy sheet metal with the sides at one end curved and thereby form an insulator receiving thimble brought together to form a seat of circular of circular cross-section throughout. cross-section, and a plurality of sections of In Witness whereof I hereunto subscribe 10 thinner sheet metal each of arcuate crossmy name this 1st day of February, A. D.,

5 section throughout and threaded, said sec- 1916.

tions being applied intimately against the side of the body end and secured thereto to CHARLES L. PEIRCE, JR.

Goplu of this patent may be ootained tor five cents ,each, by addressing the "Commissioner of l'atentl,

' Washington, D. 0. 

